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How to use proxy_server method in localstack
Best Python code snippet using localstack_python
backend_services.py
Source:backend_services.py 
1from django.contrib.auth import SESSION_KEY2from django.core.cache import cache3from django.conf import settings4from django.http import HttpResponse, HttpResponseServerError5from proxy_server.response import AJAX_REQUEST6import httplib, json, proxy_server7def invoke_backend_service(method, function_path, json_data=dict(), request=None, response_token=True, public=False, secure=False):8 error_message = None9 try:10 if public is False and request is None:11 error_message = 'A private web service must receive Django\'s request'12 raise Exception13 if response_token is True and request is None:14 error_message = 'A web service cannot expect a response token and not receive Django\'s request'15 raise Exception16 if not hasattr(settings, 'BACKEND_HOST'):17 error_message = 'No backend host and/or port specified'18 raise Exception19 if secure:20 if hasattr(settings, 'BACKEND_PORT'):21 conn = httplib.HTTPSConnection(settings.BACKEND_HOST, settings.BACKEND_PORT)22 else:23 conn = httplib.HTTPSConnection(settings.BACKEND_HOST)24 else:25 if hasattr(settings, 'BACKEND_PORT'):26 conn = httplib.HTTPConnection(settings.BACKEND_HOST, settings.BACKEND_PORT)27 else:28 conn = httplib.HTTPConnection(settings.BACKEND_HOST)29 headers = proxy_server.RESTFUL_HEADER30 headers[proxy_server.API_KEY] = settings.SECRET_KEY31 if request is not None:32 pk = cache.get(AJAX_REQUEST, None)33 if pk:34 request.user.pk = pk35 cache.delete(AJAX_REQUEST)36 headers[proxy_server.USER_TOKEN] = request.user.pk37 headers[proxy_server.CLIENT_IP] = request.META.get(proxy_server.HTTP_FROM)38 try:39 conn.request(method, function_path, json.dumps(json_data), headers)40 except:41 error_message = 'Could not connect to service'42 raise Exception43 response = conn.getresponse()44 response_data = response.read()45 conn.close()46 if response.status == 403:47 return 403, None48 if response.status == 204:49 if response_token is True:50 error_message = 'Backend server didn\'t respond with a token'51 raise Exception52 return 204, None53 else:54 try:55 response_json = json.loads(response_data)56 except:57 error_message = 'Unknown response format'58 raise Exception59 if response_token is True:60 user_dict = None61 if SESSION_KEY in request.session:62 user_dict = cache.get(request.session[SESSION_KEY])63 cache.delete(request.session[SESSION_KEY])64 request.session[SESSION_KEY] = response_json[proxy_server.USER_TOKEN]65 request.user.pk = response_json[proxy_server.USER_TOKEN]66 request.session[proxy_server.EXPIRATION_DATE] = response_json[proxy_server.EXPIRATION_DATE]67 if user_dict:68 user_dict['pk'] = request.user.pk69 cache.set(request.session[SESSION_KEY], user_dict)70 if response.status == 200:71 if response_token is True and proxy_server.USER_TOKEN not in response_json:72 error_message = 'Server expected user token in response'73 raise Exception74 result = None75 if proxy_server.RESPONSE in response_json:76 result = response_json[proxy_server.RESPONSE]77 return 200, result78 else:79 code = response.status80 if proxy_server.ERROR in response_json:81 error_message = response_json[proxy_server.ERROR][proxy_server.MESSAGE]82 raise Exception(code)83 else:84 error_message = response.reason85 raise Exception(code)86 except Exception as e:87 if error_message is None:88 error_message = 'Unknown error in service invocation'89 code = int(str(e)) if e is not None and isinstance(str(e), int) else 50090 error = {91 'error': {92 'code': code,93 'type': 'ProxyServerError',94 'message': error_message95 }96 }97 return code, error98def invoke_backend_service_as_proxy(request, method, function_path, json_data=dict(), response_token=True, secure=False):99 error_message = None100 try:101 if not hasattr(settings, 'BACKEND_HOST'):102 error_message = 'No backend host and/or port specified'103 raise Exception104 if secure:105 if hasattr(settings, 'BACKEND_PORT'):106 conn = httplib.HTTPSConnection(settings.BACKEND_HOST, settings.BACKEND_PORT)107 else:108 conn = httplib.HTTPSConnection(settings.BACKEND_HOST)109 else:110 if hasattr(settings, 'BACKEND_PORT'):111 conn = httplib.HTTPConnection(settings.BACKEND_HOST, settings.BACKEND_PORT)112 else:113 conn = httplib.HTTPConnection(settings.BACKEND_HOST)114 headers = proxy_server.RESTFUL_HEADER115 headers[proxy_server.USER_TOKEN] = request.META.get(proxy_server.HTTP_USER_TOKEN)116 headers[proxy_server.CLIENT_IP] = request.META.get(proxy_server.HTTP_FROM)117 headers[proxy_server.API_KEY] = request.META.get(proxy_server.HTTP_API_KEY)118 try:119 conn.request(method, function_path, json.dumps(json_data), headers)120 except:121 error_message = 'Could not connect to service'122 raise Exception123 response = conn.getresponse()124 response_data = response.read()125 conn.close()126 if response.status == 403:127 resp = HttpResponse(status=response.status, reason=response.reason)128 for header, value in response.getheaders():129 resp[header] = value130 for header in proxy_server.HOP_BY_HOP:131 del resp[header]132 resp[proxy_server.HEADER_SERVER] = proxy_server.VALUE_SERVER133 return resp134 if response.status == 204:135 if response_token is True:136 error_message = 'Backend server didn\'t respond with a token'137 raise Exception138 resp = HttpResponse(status=response.status, content_type='application/json', reason=response.reason)139 for header, value in response.getheaders():140 resp[header] = value141 for header in proxy_server.HOP_BY_HOP:142 del resp[header]143 resp[proxy_server.HEADER_SERVER] = proxy_server.VALUE_SERVER144 return resp145 else:146 try:147 response_json = json.loads(response_data)148 except:149 error_message = 'Unknown response format'150 raise Exception151 if response.status == 200:152 if response_token is True and proxy_server.USER_TOKEN not in response_json:153 error_message = 'Server expected user token in response'154 raise Exception155 resp = HttpResponse(response_data, status=response.status, content_type='application/json', reason=response.reason)156 for header, value in response.getheaders():157 resp[header] = value158 for header in proxy_server.HOP_BY_HOP:159 del resp[header]160 resp[proxy_server.HEADER_SERVER] = proxy_server.VALUE_SERVER161 return resp162 except Exception as e:163 if error_message is None:164 error_message = 'Unknown error in service invocation'165 code = int(str(e)) if e is not None and isinstance(str(e), int) else 500166 error = {167 'error': {168 'code': code,169 'type': 'ProxyServerError',170 'message': error_message171 }172 }...
test_proxy.py
Source:test_proxy.py
1"""2Test ability to proxy requests.3"""4import os5import ssl6import unittest7from geopy.compat import urlopen8from geopy.exc import GeocoderServiceError9from geopy.geocoders.base import Geocoder10from test.proxy_server import ProxyServerThread11try:12 from urllib.request import getproxies13except ImportError: # py214 from urllib2 import getproxies15CERT_SELFSIGNED_CA = os.path.join(os.path.dirname(__file__), 'selfsigned_ca.pem')16# Are system proxies set? System proxies are set in:17# - Environment variables (HTTP_PROXY/HTTPS_PROXY) on Unix;18# - System Configuration Framework on macOS;19# - Registry's Internet Settings section on Windows.20WITH_SYSTEM_PROXIES = bool(getproxies())21class DummyGeocoder(Geocoder):22 def geocode(self, location):23 geo_request = self._call_geocoder(location, raw=True)24 geo_html = geo_request.read()25 return geo_html if geo_html else None26class ProxyTestCase(unittest.TestCase):27 remote_website_http = "http://example.org/"28 remote_website_https = "https://example.org/"29 timeout = 530 def setUp(self):31 self.proxy_server = ProxyServerThread(timeout=self.timeout)32 self.proxy_server.start()33 self.proxy_url = self.proxy_server.get_proxy_url()34 def tearDown(self):35 self.proxy_server.stop()36 self.proxy_server.join()37 def test_geocoder_constructor_uses_http_proxy(self):38 base_http = urlopen(self.remote_website_http, timeout=self.timeout)39 base_html = base_http.read()40 geocoder_dummy = DummyGeocoder(proxies={"http": self.proxy_url},41 timeout=self.timeout)42 self.assertEqual(0, len(self.proxy_server.requests))43 self.assertEqual(44 base_html,45 geocoder_dummy.geocode(self.remote_website_http)46 )47 self.assertEqual(1, len(self.proxy_server.requests))48 def test_geocoder_constructor_uses_https_proxy(self):49 base_http = urlopen(self.remote_website_https, timeout=self.timeout)50 base_html = base_http.read()51 geocoder_dummy = DummyGeocoder(proxies={"https": self.proxy_url},52 timeout=self.timeout)53 self.assertEqual(0, len(self.proxy_server.requests))54 self.assertEqual(55 base_html,56 geocoder_dummy.geocode(self.remote_website_https)57 )58 self.assertEqual(1, len(self.proxy_server.requests))59 @unittest.skipUnless(60 hasattr(ssl, 'create_default_context'),61 "The current Python version doesn't support `ssl.create_default_context`."62 )63 def test_ssl_context_with_proxy_is_respected(self):64 # Create an ssl context which should not allow the negotiation with65 # the `self.remote_website_https`.66 bad_ctx = ssl.create_default_context(cafile=CERT_SELFSIGNED_CA)67 geocoder_dummy = DummyGeocoder(proxies={"https": self.proxy_url},68 ssl_context=bad_ctx,69 timeout=self.timeout)70 self.assertEqual(0, len(self.proxy_server.requests))71 with self.assertRaises(GeocoderServiceError) as cm:72 geocoder_dummy.geocode(self.remote_website_https)73 self.assertIn('SSL', str(cm.exception))74 self.assertEqual(1, len(self.proxy_server.requests))75 def test_geocoder_constructor_uses_str_proxy(self):76 base_http = urlopen(self.remote_website_http, timeout=self.timeout)77 base_html = base_http.read()78 geocoder_dummy = DummyGeocoder(proxies=self.proxy_url,79 timeout=self.timeout)80 self.assertEqual(0, len(self.proxy_server.requests))81 self.assertEqual(82 base_html,83 geocoder_dummy.geocode(self.remote_website_http)84 )85 self.assertEqual(1, len(self.proxy_server.requests))86 def test_geocoder_constructor_has_both_schemes_proxy(self):87 g = DummyGeocoder(proxies=self.proxy_url, scheme='http')88 self.assertDictEqual(g.proxies, {'http': self.proxy_url,89 'https': self.proxy_url})90@unittest.skipUnless(not WITH_SYSTEM_PROXIES,91 "There're active system proxies")92class SystemProxiesTestCase(unittest.TestCase):93 remote_website_http = "http://example.org/"94 timeout = 595 def setUp(self):96 self.proxy_server = ProxyServerThread(timeout=self.timeout)97 self.proxy_server.start()98 self.proxy_url = self.proxy_server.get_proxy_url()99 self.assertIsNone(os.environ.get('http_proxy'))100 self.assertIsNone(os.environ.get('https_proxy'))101 os.environ['http_proxy'] = self.proxy_url102 os.environ['https_proxy'] = self.proxy_url103 def tearDown(self):104 self.proxy_server.stop()105 self.proxy_server.join()106 os.environ.pop('http_proxy', None)107 os.environ.pop('https_proxy', None)108 def test_system_proxies_are_respected_by_default(self):109 geocoder_dummy = DummyGeocoder(timeout=self.timeout)110 self.assertEqual(0, len(self.proxy_server.requests))111 geocoder_dummy.geocode(self.remote_website_http)112 self.assertEqual(1, len(self.proxy_server.requests))113 def test_system_proxies_are_respected_with_none(self):114 # proxies=None means "use system proxies", e.g. from the ENV.115 geocoder_dummy = DummyGeocoder(proxies=None, timeout=self.timeout)116 self.assertEqual(0, len(self.proxy_server.requests))117 geocoder_dummy.geocode(self.remote_website_http)118 self.assertEqual(1, len(self.proxy_server.requests))119 def test_system_proxies_are_reset_with_empty_dict(self):120 geocoder_dummy = DummyGeocoder(proxies={}, timeout=self.timeout)121 self.assertEqual(0, len(self.proxy_server.requests))122 geocoder_dummy.geocode(self.remote_website_http)123 self.assertEqual(0, len(self.proxy_server.requests))124 def test_string_value_overrides_system_proxies(self):125 os.environ['http_proxy'] = '127.0.0.1:1'126 os.environ['https_proxy'] = '127.0.0.1:1'127 geocoder_dummy = DummyGeocoder(proxies=self.proxy_url,128 timeout=self.timeout)129 self.assertEqual(0, len(self.proxy_server.requests))130 geocoder_dummy.geocode(self.remote_website_http)...
route.py
Source:route.py
1import typing as t2from dimensigon.network.low_level import check_host3from dimensigon.utils.typos import UUID4from dimensigon.web import db, errors5if t.TYPE_CHECKING:6 from dimensigon.domain.entities import Server, Gate7class RouteContainer:8 def __init__(self, proxy_server: t.Optional['Server'], gate: t.Optional['Gate'], cost: t.Optional[int]):9 self.proxy_server = proxy_server10 self.gate = gate11 self.cost = cost12 def __str__(self):13 return f"proxy_server={getattr(self.proxy_server, 'name', None)}, gate={self.gate}, cost={self.cost}"14 def __repr__(self):15 return f"RouteContainer(proxy_server={getattr(self.proxy_server, 'id', None)}, " \16 f"gate={getattr(self.gate, 'id', None)}, cost={self.cost}"17 def __iter__(self):18 yield self.proxy_server19 yield self.gate20 yield self.cost21 def __getitem__(self, item):22 if item == 0:23 return self.proxy_server24 elif item == 1:25 return self.gate26 elif item == 2:27 return self.cost28 else:29 IndexError('list index out of range')30 def __eq__(self, other):31 return isinstance(other, self.__class__) and self.cost == other.cost and self.gate == other.gate \32 and self.proxy_server == other.proxy_server33class Route(db.Model):34 __tablename__ = 'L_route'35 destination_id = db.Column(UUID, db.ForeignKey('D_server.id'), primary_key=True, nullable=False)36 proxy_server_id = db.Column(UUID, db.ForeignKey('D_server.id'))37 gate_id = db.Column(UUID, db.ForeignKey('D_gate.id'))38 cost = db.Column(db.Integer)39 destination = db.relationship("Server", foreign_keys=[destination_id], back_populates="route", lazy='joined')40 proxy_server = db.relationship("Server", foreign_keys=[proxy_server_id], lazy='joined')41 gate = db.relationship("Gate", foreign_keys=[gate_id], lazy='joined')42 def __init__(self, destination: 'Server', proxy_server_or_gate: t.Union['Server', 'Gate'] = None, cost: int = None):43 # avoid cycle import44 from dimensigon.domain.entities import Server45 self.destination = destination46 if isinstance(proxy_server_or_gate, Server):47 proxy_server = proxy_server_or_gate48 gate = None49 else:50 proxy_server = None51 gate = proxy_server_or_gate52 if proxy_server:53 if proxy_server == destination:54 raise ValueError('You must specify a gate when proxy_server equals destination')55 else:56 if cost is None or cost == 0:57 raise ValueError("Cost must be specified and greater than 0 when proxy_server")58 self.proxy_server = proxy_server59 self.cost = cost60 elif gate:61 # check if gate is from neighbour or from a proxy server62 if destination == gate.server:63 if cost is not None and cost > 0:64 raise ValueError("Cost must be set to 0 when defining route for a neighbour")65 self.gate = gate66 self.cost = 067 else:68 if cost is None or cost <= 0:69 raise ValueError("Cost must be specified and greater than 0 when gate is from a proxy_server")70 else:71 self.proxy_server = gate.server72 self.cost = cost73 elif cost == 0:74 # find a gateway and set that gateway as default75 if len(destination.external_gates) == 1:76 self.gate = destination.external_gates[0]77 self.cost = 078 else:79 for gate in destination.external_gates:80 if check_host(gate.dns or str(gate.ip), gate.port, timeout=1, retry=3, delay=0.5):81 self.gate = gate82 self.cost = 083 break84 # if not (self.gate or self.proxy_server):85 # raise ValueError('Not a valid route')86 def validate_route(self, rc: RouteContainer):87 if rc.proxy_server:88 if not (rc.gate is None and rc.cost > 0):89 raise errors.InvalidRoute(self.destination, rc)90 if rc.proxy_server._me:91 raise errors.InvalidRoute(self.destination, rc)92 elif rc.gate:93 if not rc.cost == 0:94 raise errors.InvalidRoute(self.destination, rc)95 else:96 if rc.cost is not None:97 raise errors.InvalidRoute(self.destination, rc)98 def set_route(self, rc: RouteContainer):99 self.validate_route(rc)100 self.proxy_server, self.gate, self.cost = rc101 def __str__(self):102 return f"{self.destination} -> " \103 f"{self.proxy_server or self.gate}, {self.cost}"104 def __repr__(self):105 return f"Route({self.to_json()})"106 def to_json(self, human=False):107 if not self.destination.id or (self.proxy_server and not self.proxy_server.id) or (108 self.gate and not self.gate.id):109 raise RuntimeError("commit object before dump to json")110 if human:111 return {'destination': str(self.destination) if self.destination else None,112 'proxy_server': str(self.proxy_server) if self.proxy_server else None,113 'gate': str(self.gate) if self.gate else None,114 'cost': self.cost}115 else:116 return {'destination_id': self.destination_id,117 'proxy_server_id': self.proxy_server_id,118 'gate_id': self.gate_id,...
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